public async Task OnAppearing_runs_after_PopModalAsync(bool isAnimated)
        {
            await navController.PushAsync <TestViewModel1>();

            await navController.PushModalAsync <TestViewModel2>();

            await navController.PopModalAsync(isAnimated);

            Assume.That(navController.TopViewModel is TestViewModel1);
            var vm = navController.TopViewModel as TestViewModel1;

            Assert.IsTrue(vm.OnAppearingRuns == 2);
        }